Although Ribosome binding site sequence vary considerably in different genes, they include examples like GAGGGG that could serve as code for Glu-Gly. Does this imply that the amino acid sequence Glu-Gly can never occur in a protein, lest the two mRNA codons be read as a RBS sequence? Explain

Although Ribosome binding site sequence vary considerably in different genes, they include examples like GAGGGG that could serve as code for Glu-Gly. Does this imply that the amino acid sequence Glu-Gly can never occur in a protein, lest the two mRNA codons be read as a RBS sequence? Explain

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Description: Although Ribosome binding site sequence vary considerably in different genes, they include examples like GAGGGG that could serve as code for Glu-Gly. Does this imply that the amino acid sequence Glu-Gly can never occur in a protein, lest the two mRNA

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter30: Protein Synthesis

Section: Chapter Questions

Problem 5P: Consequences of the Wobble Hypothesis Point out why Cricks wobble hypothesis would allow fewer than...

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Although the RBS (Ribosome-Binding Site) sequences vary considerably in different genes, they include examples like GAGGGG that could serve as code for Glu-Gly. Does this imply that the amino acid sequence Glu-Gly can never occur in a protein, lest the two mRNA codons be read as a RBS sequence? Explain your answer.
What is the total size of the mature i.e. fully processed mRNA in nucleotides? How many amino acids would the encoded protein be? Assume that the N- terminal Met encoded by the AUG start codon, is NOT cleaved from the protein?
The mRNA formed from the repeating tetranucleotide UUACincorporates only three amino acids, but the use of UAUC incorporates four amino acids. Why?
The primary protein structure is shown in Figure 9-3(a).Where in the mRNA (near the 5′or 3′end) would a mutation in R2 be encoded?
A. What amino acid sequence is encoded by the codon sequence AUAAUGGUAACGGUU? B. Suppose the codon sequence AGACACUCUAUUAAA has a single base pair mutation to AGACACUCUUUUAAA. If the old protein sequence was Arg-His-Ser-Ile-Lys, what will be the new sequence encoded by the mutant gene?
Indicate the amino acid sequence of the protein encoded by the following mRNA molecule. Use the genetic code table and assume that the very first “AUG” the ribosome encounters will serve as the start codon and specify methionine. 5’-AAUUCAUGCCCAAAUUUGGGGCACGAAGCUUCUUAGGCUAGUCCUAAAAAA-3’
Suppose the codon sequence GUGCAAUUCGAGGCC has a single base pair mutation to GUGCAAUUCAAGGCC. If the old protein sequence was Val-Gln-Phe-Glu-Ala, what will be the new sequence encoded by the mutant gene? ____________________________.
The a chain of eukaryotic hemoglobin is composed of 141 amino acids. What is the minimum number of nucleotides in an mRNA coding for this polypeptide chain?
The wobble rules for tRNA-mRNA pairing are shown. If we assume that the tRNAs do not containmodified bases, what is the minimum number of tRNAs needed to recognize the codons for the following types of amino acids? A. Leucine B. Methionine C. Serine
Assuming that each nucleotide is 0.34 nm long in mRNA, howmany triplet codes can simultaneously occupy space in a ribosomethat is 20 nm in diameter?
Explain whether the specificity of lysine incorporation by lysyl-tRNA synthetase depends on tRNA or lysine, how does it work ?
A synthetic mRNA added to a cell-free protein-synthesizing system produces a peptide with the following amino acid sequence: Met-ProIle-Ser-Ala. What would be the effect on translation if the following component were omitted from the cell-free protein-synthesizing system? What, if any, type of protein would be produced? Explain your reasoning. Q. GTP